Device for fastening doors



(No M dem W. A. SPRADO. DEVICE FOR FASTENING DOORS.

1 9 Patented Jan. 4, 1887.

Written STA E PATENT Grinch.

WILLIAM A. SPRADO, OF RAOINE, WISCONSIN.

DEVICE 'FOR FASTENENGJDOORSa SPECIFICATION forming part of LettersPatent No. 355,419, dated January 4, 1887.

Application filed September 16, 1886. Serial No. 213,708. (No model.) i

.ence being had to the accompanying drawings,

and to the letters or figures of reference marked thereon, which form apart of this specification.

My invention, to be hereinafter distinctly claimed, relates to thatclass of door-fastenings adapted to fasten or lock the door when it ispartly open or ajar, whereby ventilation is sea cured, while it isimpossible to open the door from the outside farther than is providedfor by my fastening,thus securing the door against the entrance ofthieves or burglars.

In the accompanying drawings, Figure l is a perspective of mynewly-invented device at fixed to the casing of a door and to a. door,showing also the mode of its use. Fig. 2 is a detail.

A slotted arm, A, is hinged at one end to a base-plate, B, whichbase-plate is affixed to the door-casing O on the inside, at or near theedge to which the door when closed abuts. A bracket, D, is affixed tothe door E on the inside of the room, at or near the free swinging edgeof the door, and opposite to the arm A and base-plate B, which bracketis provided with a shank, p, aneck, r, and a head, q. The shank 1) maybe very short, so that the neck 1- will be carried out almost directlyfrom the base of the bracket, and but slightly in front of the side ofthe door, as shown in Fig. 1; or

i the shankp may project out quite a little distancein front of the sideofithe door, in the form shown in Fig. 2, as may be necessary to adaptthe device to doors set flush with the edge of the casing orconsiderably within the casing; but the shank 12 should be of suchlength that the head (1 will lie down close against the base-plate Bvwhen the door is closed.

The arm A, at its inner end, is so hinged to the base-plate B that itmay be folded back against or closed upon the base-plate B and thecasing O, as indicated by dotted lines in Fig. 1, or swing out at rightangles (and perllivaps a little more) to the casing, as shown in The armA is provided with a slot, 5, running from its hinged end nearly to itsouter free end, which slot at its inner end is enlarged, forming anaperture, 15, which aperture 15 is just long enough to permit the head q(of bracket D) to freelypass the end of arm A,

when that arm is folded back upon the casing, as it is intended to be atall times when notin use for locking the door. The slot 8 is wide enoughto freely admit the neck 7, (of bracket D,) but not wide enough to allowthe headq to escape through it. I

The neck 1 is sufficiently long that, the door being closed and the armA then thrown out at right angles to the casing, the head q. of bracketD will, when the door is opened, pass just inside or behind the arm A,as shown in Fig. 1. It will thus be seen that when the arm A is foldedback upon the casing the door may be freely opened and closed withoutlet or hinderanee by or from thedeviee in any man ner whatever, but thatif the arm A is opened out at right angles to the casing when the dooris closed, and the door is thereupon opened, the head q of bracket Dwill be caught behind and held by the arm A, whereby thedoor cannot beopened farther than the length of the slot 8 will permit the bracket Dand door E to go, and it will be impossible from the outside of the doorto remove the head qfrom behind the arm A, as that can only be done byclosing the door, when operations from the outside are impracticable.

As the arm A might'by accident be thrown out at right angles to thecasing when the door is wide open, I preferably curve the free outer endof the arm a little inward or backward, so that the door in swinging toits closed position would impinge against the curved part and force thearm back and allow the door to close. This curved form of end for thisarm is also desirable, that the end of the arm will, when it is foldedback, lie closeto the casing, and not expose an angular end, which wouldbe liable to be inconvenient and unsightly.

To make this device still more convenient and effective, I provide aspring, F, attached to the baseplate B, one end of which spring liesagainst the base-plate, and the other end bears against the arm A, andis adapted to force the arm'outwardly into the position shown in Fig. 1,while an elongated swinging button, G, pivoted on a standard, at, rigidin base-plate 13, passes up through the slot 8, when the arm A is beingfolded back upon the casing B, and is adapted, Whenit has so passed 5through slot 8, to be turned upon the arm A and hold it back in positionon the casing B. What I claim as new, and desire to secure by LettersPatent, is

1. In a doorfastener, a slotted swinging IO arm, A, hinged to abase-plate, B, which baseplate is aflixed to the door-frame, and aspring, F, inserted between the base-plate and slotted arm, said springbeing adapted to cause the arm to projectoutwardly, yielding from the 15base-plate, substantially as described.

2 In a door-fastener, a slotted swinging arm, A, hinged to thedoor-frame, and a button, G, pivoted on a standard, u, substantially asdescribed.

3. In a door-fastening, the combination of 20 a base-plate, B, arm A,spring F, and swinging button G, substantially as described.

In testimony whereofI afiix my signature in presence of two witnesses.

WILLIAM A. SPBADO.

Witnesses:

ERASTUS O. PEoK, L. H. LARSEN.

